Apparatus for hydrating lime.



A. M. SCHOFIELD..

APPARATUS FOR HYDRATING LIME. APPLICATION FILED JUNE 12. 1916.

1,204,700. Patented Nov. 14,1916.

4 SHEE1SSHEEI' I.

Q & 3% A 1 1 v N N s Q 8 w b 1 A 1 .1 11 1 w W 3 1: fig 1 0 Inventor,

Attorneys A. SCHOFIE'LD.

APPARATUS FOR HYDRATING LIME.

APPLICATION FILED JUNE 12. 1916.

1,204,700. 11116111611 Nov. 14, 1916.

4 SHEEIS-SHEEI 2.

I Attorneys 1\ &

Inventor;

A. M. SCH'OFIELD.

APPARATUS FOR HYDRATING LIME.

APPLICATION FILED JUNE 12. I916- 1,204:,700. Patented Nov. 14, 1916.

4 SHEUS-SHEET 3.

Witnesses Inventor} Attorneys A. M. SCHOFIELD. APPARATUS FOR HYDRATING LIME.

APPLICATION FILED JUNE 12. 1916.

Patented Nov. 14, 1916.

4 SHEETSSHEET 4.

Witnesses Attorneys.

UNITED STATES PATENT OFFICE.

time n. scnormnn, or manner, 0310.

v AI PPARATUS- FOR HYDBATING LIME.

Original application filed January 31, 1916, Serial No. 75,882. Divided and. this application filed .Tune 12,

1916. Serial No. 103,181.

To all whom it, may concern Be it known that I, ARTHUR M. SoHoFmLD,

a citizen of the United States, residing at Amherst, in the county of Lorain and State 5 of Ohio, have invented a new and useful Apparatus for Hydrating Lime, of which the following is a specification.

The device forming the subject matter of this application discloses matter divided out of my prior application for a' process and apparatus forfihydrating lime, Serial No.

75,382, filed on the 31st day of January,.

v generated may be made effective for any desired purpose.

Another object of the invention is to provide novel means whereby the heat generated in the manner hereinbefore stated may be used for heating the water which is admitted onto the lime.

In additionto the foregoing, the invention contemplates novel means whereby the container may be sealed to prevent the escape of steam, thereby to render the heat generated'eflicient for the ends above stated,

it being possible to admit the lime into :the container, and to permit the slaked lime to pass therefrom, without producing any appreciable diminution of the steam pressure within the container.

' The invention aims to provide novel means for feeding the unslaked lime into the container. as It is within the province of the disclosure to. improve generally and to enhance the utility of devices of that type herein disclosed. I

With the above and other-objects in view which will appear as the description proceeds, .the invention resides in the combination and-arrangement of parts "and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be, made within the scope of what is .claimed, without departing from the spirit of the invention.

In the accompaning drawings :.Figure 1 shows in side elevation, a lime hydrating apparatus embodying the present invention, parts being broken away; Fig. 2 is a top plan of the structure shown in Fig. 1; Fig. 3 is a sectional diagrammatic representation of the apparatus; Fig. 4 is a cross section taken adjacent the forward end of the container, the parts appearing for the most part in elevation; Fig. 5 is a fragmental longitudinal section taken along the line 55 of Fig. 4; Fig. 6 is a section taken approximately along the line 6-6 of Fig. 1; Fig. 7 is a fragmental top plan showing a portion of the means whereby a feeding of the unslaked lime is brought about; Fig. 8 is a side elevation of the structure shown in Fig. 7; and Fig. 9 is a fragmental vertical section showing one ofthe-discharge nozzles whereby water is introduced onto the un.- slaked lime within the container.

In carrying out the present invention there is provided a tubular container denoted generally by the numeral 1 and embodying an outer shell 2 and an innershell 3. The container 1 includes a rear head 4 and a front head 5. The container 1 may beupheld in a substantially. horizontal positionin any desired manner, as by supports 6.

Atits forward end, the container 1 is provided with an inlet 7 for unslaked lime. In the inlet 7 is journaled a shaft 8 includin a plurality of blades 9. The sides of the i et '7. are curved as shown at 10, so as to cooperate with the'edges of the blades 9, the construction being such that, although the blades 9 will advance unslaked lime into the container 1, any appreciable leakage of steam from the 1nterior of the container 1 through the inlet 7 will be prevented. The

inlet 7 ordinarily communicates with a'chute Specification of Iietters Patent. Patented N 14:, 1916, v

although the slaked lime may pass through outlet 14, any appreciable leakage of steam generated within the container 1 will be avoided.

Extended longitudinally of the container 1 is a main shaft 18, the same bein journaled in the heads 4 and 5 and, if esired,

being journaled on bearings 19 .located within the container. Secured to the main shaft 18 and located within the container 1 are a plurality of sets of blades, three sets being shown in the present instance. Re-

ferring to the diagrammatic figure which is numbered 3, the blades of the first set are denoted by the numeral 20, the blades of the second set are denoted by the numerals 21 and 22, and the blades of the third set are denoted by the numerals 23 and 24. The

- set, that is, the set which is adjacent the rear end of the machine, the blades 23 are advancing blades, the blades 24 being retardingblades. The number in each set and the relative arrangement of the blades therein may be altered, depending upon the character of the lime which is being handled. Preferably, however, the blades 20 of the first set are all advancing blades. In the intermediate set, one third of the blades are adapted to advance the material, and

two thirds areadapted to retard it. In the last set, that is, the set adjacent the rear end of the machine, one quarter of the blades are pitched to advance the material, and three quarters are pitched to retard the material. These proportions will be varied in practice, but represent a fair average.

The shaft 15 which operates the means for sealing the outlet 14 may be connected operatively with the main shaft 18 in any desired manner. In the present embodiment of the invention, a sprocket wheel 25 is secured to the exposed rear end of the shaft 18, a sprocket wheel 26 is secured to the shaft 15, and about the sprocket wheels is trained a sprocket chain 65.

-Any suitable means may be provided for driving the shaft 18. If desired, this driving means may include a shaft 27, journaled in bearings 28 and provided with a pinion 29 meshing into a gear wheel 30 carriedi by a shaft 31 journaled in bearings 32. A pinion 33 on the shaft 31 meshes into a gear wheel 34 carried by the main shaft 18, the main shaft bein ournaled at its end in a bearing 35 extenor to the container 1.

A means is employed whereby a step-bystep rotation is imparted to shaft 8, to feed.

the unslaked lime into .the container 1.

With this end in view, theshaft 31 is provided as shown in Fig. 4 with a crank disk 36 carrying a wrist pin 37 ooacting with a 45 adapted to coact with the ratchet wheel 43. Assembled with the end ofthe shaft 44 is a weight 46 which serves to maintain pawl 45 in engagement with the ratchet wheel 43. A cross member 47 is mounted to move longitudinally of the frame 42, in slots 48 formed in the sides of the frame and shown best in'Fig. 8. The position of the cross member may be adjusted, longitudinally of the frame, by means of a screw 49 coiiperating with the cross member and the frame. The socket 40 which iscarried by the upper end of the connecting rod 39 is mounted to swing on the cross member 47. The limefeeding mechanism above described may be changed without jeopardizing the utility of the invention. It is necessary merely that there shall be a continuous flow of unslaked lime in proper proportion to the amount of water delivered, and that the egress of steam be prevented.

Intermediate the ends of the container 1, the walls 2 and 3 thereof are separated by a partition or wall 50, providing adjacent the rear end of the container a water space 52, and defining adjacent the forward end of the container a heat-insulating space 53 which may contain a heat resisting material 51. At a point spaced from the rear end of the container 1, opposed portions of the water space 52 are connected by circulating tubes 54, lying within the container 1 as best shown in Fig. 6. A water inlet 55 for the space 52 is provided, and the water outlet may be in the form of a pipe 56. The pipe 56 may lead to any point where hot water or steam is desired, but in the present instance, the pipe 56 leads to a water storage tank 57, disposed on top,

of the lime bin 12 or elsewhere, The tank 57 is provided with an overflow outlet 58 and leading from the tank is adischarge conduit 59 carrying a regulating and indicating valve 60 of any desired sort. The stem of the valve 60 may carry a finger 6O adapted to cotiperate with a scale 60*. The lower end of the conduit 59 communicates with a cross pipe 61 disposed adjacent the head 5 of the container as shown most clearly in Fig. 4. Projecting from the cross pipe 61 are nipples 62 coiiperating with nozabove pointed out, the amount of lime fed 2.1363 (Fig. 9) mounted in the head 5, each nozzle being equipped with an outlet 64. 3

The operation-of feeding unslaked lime from the bin 12 intothe container 1 is .as follows; When'the shaft 31 is rotated, the crank disk 36 and the wrist pin 37 impart a reciprocating movement to the connecting rod 39, the latter tilting the frame 42, whereupon pawl 45 will acutate the ratchet wheel 43 and the shaft 8, the blades 9 swinging in close relation to the curved side walls .of the inlet 7, and admitting the lime in the inlet 7 practically steam-tight, so that steam generated within the container 1 as hereinafter described may not escape. An

adjustment is provided whereby the angular'position of the arc of the throw of the frame 42 may be regulated. This adjust ment is brought about by rotating the con-. necting rod .39 which is threaded into the sockets 38 and 40, the effective length of the connecting rod thus being changed. This adjustment ordinarily is made by the erector and represents an average adjust ment. vA further adjustment to regulate the throw of the frame 42 may be brought about by rotating thescrew 49, thus to cause the cross member 47 to move toward and away from, the. axis of the shaft 8, thereby varying the effective length of the frame 42. The adjustment last above described preferably is made by the operator in control of the machine. Owing to the construction into the container 1 may be regulated.

The driving train for the shaft 18 embodies the pinion 29, the gear wheel 30, the shaft 31, pinion '33 and the gear wheel 34.

' As hereinbefore mentioned, the shaft 15 which operates in the outlet 14 is driven from the shaft 18 by the sprock et wheel 25,

the sprocket chain 65 and the sprocket wheel .26.

Water is delivered onto the unslaked lime at the forward end of the container 1 by the pipe 59 and the nozz1es63. As the lime is thusslaking, steam and heat are generated.

.In this connection it is to be observed that,

adjacent its forward end, the container 1 is surrounded by the heat resisting materlal 51, so as to retain the heat. The heat, there- 'fore, is held at a point whereby heat .is

most necessary,'in order to facilitate. the

chemical reaction between the water and the 'unslaked lime.

As the lime moves along the, container v 1,'through the instrumentality of a means,

the operation of which will be explained hereinafter, the lime ultimately arrives in v the zone surrounded by the water acket 52-.

The heat in the lime thus is abstracted, so that the lime leaves the machine ata point approximating as closely as possible, the

'in jacket 52 to a point adjacent or above boiling. When it'is recalled that every pound of lime which is slaked has given-ofi' 500 British thermal units, or approximately one-horse power, it will be obvious that if the present machine has but a low efficiency, a considerable amount .of energy may be saved, to be utilized'for anypurpose. If desired, water heated inthe manner hereinbefore described, may be delivered into the tank 57 and may pass byway of thepipe 59, onto the unslaked lime.

As to the manner in which the blades-20, 21,22, and 23 operate on the lime, it will be recalled that the blades 20 are all adapted to advance the lime at theforward end of the container 1 and while the; lime is in a granular and plastic form, the lime when in this condition requiring the most potent means far advancing it. Owing to the relation existing between the blades 21 and 22 of theintermediate set, the blades 21 being advancing blades and the blades 22 being retracting -or retarding blades, the lime is.' held as long as necessary in this zone,.the

general tendency of thelime being to advance, owing to. its finely divided condition. When the lime reaches that set of blades which is located adjacent the rear end of- By, proper manipulation of the valve ,60 and by effecting a proper throw ,of the 'frame 42, the amountof water and the amount of lime delivered to the container 1 may be regulated, it beingv customary in practice to combine the lime and the water in proportion to their chemical equivalents.

The operation of the structure forming the subject matter of thisapplication is practically continuous, and the container is sealed sov that the steam may be maintained therein. The device herein disclosed is so constructed that the heat produced as the lime is slaking may be saved and may be applied to any usefulpurpose, such as heating the water which is delivered onto the unslaked lime.

The container 1 maybe provided with all of the usual adjuncts, such as man holes 75, a sampler 7 6 and the like.

Having thus described theinventiomwhat is claimed as new. is

1. A lime hydrator embodying a container; means for. admitting lime to the container; a lime outlet for the container; means for admitting water to the container; a heat retaining jacket located on the container adjacent the means for admitting outlet, the heat created by the slahng of the lime; a water jacket located on the conlime. taineradjacent the outlet; an inlet for the In testimony that I claim the foregoing jacket; and an outlet for the jacket. as my own, I have hereto afixed my signa- 5 Ifn a Lime hydrator, a1 containlergfa Inge ture in the presence of two WitIlGSSfiS;

in et or t e container; :1 ime out et or t e container; means for admitting water to the T SCHOFKELD' container; means for retaining adjacent the Witnesses: inlet, the heat created by the slaking of the J. J. Smmima,

10 lime; and means for salvaging, adjacent the EDNA Mnnz. 

